-
List the four structural classes of neurons discussed in class.
- anaxonic
- bipolar
- unipolar
- multipolar
-
An neuron whose axons and dendrites are indistinguishable is an:
anaxonic neuron
-
Where in the human body do we find anaxonic neurons?
- the brain
- special sense organs
-
An axon with two processes, one on each end, is called a:
bipolar neuron
-
Which structural type of neuron is the most rare?
bipolar neurons
-
A neuron with one process leaving the cell body that splits into dendrites and synapses is a(n):
unipolar neuron
-
All sensory neurons are _______ neurons.
unipolar
-
A neuron with an axon on one end and multiple dendrites on the other end is a:
multipolar neuron
-
Which type of neuron is the most common?
multipolar neurons
-
Motor neurons are _______ neurons.
multipolar
-
Somatic sensory neurons carry information from sensory receptors to the:
central nervous system
-
True or False: We are aware of the information being transmitted by somatic sensory neurons.
True
-
List the three functional classes of neurons discussed in class.
- sensory neurons
- motor neurons
- interneurons
-
Visceral sensory neurons carry information about your _______ to the CNS.
organ systems
-
Are we aware of the information being transmitted by visceral sensory neurons?
no, we are not
-
List the three types of sensory receptors discussed in class.
- interoceptors
- proprioceptors
- exteroceptors
-
Organ systems and sense of taste are monitored by:
interoceptors
-
Muscle position and tension of ligaments and tendons are monitored by:
proprioceptors
-
Which type of receptor monitors the external environment, tactile receptors, and the remaining special senses?
exteroceptors
-
What is the purpose of interneurons?
to integrate somatic and motor neural systems
-
Which functional type of neurons are involved in higher function and outnumber the other types of neurons?
interneurons
-
What type of cell myelinates neurons?
schwann cells
-
Which type of propagation involves unmyelinated axons?
continuous propagation
-
List the four steps of continuous propagation discussed in class.
- axon hillock depolarizes (+30 mV) and action potential reaches 1st subunit opening sodium channels
- sodium diffuses towards the 2nd subunit and brings it to threshold
- voltage-gated channels open, sodium flows in, segment 2 depolarizes to +30 mV
- process then repeats
-
List the four steps of saltatory propagation discussed in class.
- intial segment depolarizes to +30 mV
- sodium ions diffuse to node 1 and bring it to threshold
- voltage-gated channels open and node 1 depolarizes
- process continues
-
Which type of propagation is faster, continous or saltatory?
saltatory
-
Which type of neurons are myelinated and have the largest diameter?
type A neurons
-
Which type of neurons are myelinated with an intermediate diameter?
type B neurons
-
Which type of neuron in unmyelinated with the smallest diameter?
type C neurons
-
Which neuron will communicate faster, a large myelinated neuron, or a small unmyelinated neuron?
large, myelinated neuron
|
|